The MEMOS-U physics model, addressing macroscopic melt motion in large deformation and long displacement regimes, and its numerical schemes are presented. Discussion is centred on the shallow water application to the metallic melts induced by hot magnetized plasmas, where phase transitions and electromagnetic responses are pivotal. The physics of boundary conditions with their underlying assumptions are analysed and the sensitivity to experimental input uncertainties is emphasized. The JET transient tungsten melting experiment (Coenen et al 2015 Nucl. Fusion 55 023010) is simulated to illustrate the MEMOS-U predictive power and to highlight key aspects of tokamak melt dynamics.

提出了MEMOS-U物理模型，解决了大变形和长位移状态下的宏观熔体运动，并给出了其数值方案。讨论的重点是浅水施加到热磁化等离子体诱导的金属熔体上，其中相变和电磁响应至关重要。分析了边界条件的物理及其基本假设，并强调了对实验输入不确定性的敏感性。在JET瞬态钨熔化实验（科嫩等人2015核酸研究，聚变 55 023010）被模拟以说明MEMOS-U的预测能力，并突出托卡马克的熔化动力学关键方面。